Q: Is 40,391 a Prime Number?

A: No, 40,391 is not a prime number.

Why is 40,391 not a prime number?

A prime number is a natural number, greater than one, that can only be divided by 1 and itself.

The number 40391 can be evenly divided by 1 13 169 239 3,107 and 40,391, with no remainder.

Since 40,391 cannot be divided by just 1 and 40,391, it is not a prime number.

Number	40,389	40,390	40,392	40,393
Prime?	no	no	no	no

All positive natural numbers are either a prime number or a composite number (except the number 1, which is neither).

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